Football helmet



FIG. 1 is a perspective view of a football helmet showing my new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines in FIG. 1-7 represent boundary lines and unclaimed details that form no part of the claimed design. 

CLAIM I claim the ornamental design for a football helmet, as shown and described. 